Kleiner Perkins Caufield & Byers, one of the old-line giants of the venture capital industry, has closed its 15th traditional fund at $525 million, the firm announced late on Thursday. The fund, known as KPCB 15, will have a wide mandate, including investments in consumer and enterprise Internet start-ups, green technology and life sciences companies. It will be led by 10 of Kleiner Perkins’ partners. “Portfolio companies in KPCB 15 will benefit from the firm’s holistic approach to company building that we pioneered more than a decade ago,” Ted Schlein, a Kleiner Perkins partner, said in a statement.